<template>
  <span>{{ date }}</span>
</template>
<script lang="ts" setup>
  import { ref, watch } from 'vue'
  import { useIntervalFn } from '@vueuse/core'
  import { formatToDateTime, formatToDate, dateUtil } from '@/utils/dateUtil'
  import { isNumber, isObject, isString } from '@/utils/is'
  import { propTypes } from '@/utils/propTypes'

  defineOptions({ name: 'Time' })

  const props = defineProps({
    value: propTypes.oneOfType([propTypes.number, propTypes.instanceOf(Date), propTypes.string])
      .isRequired,
    step: propTypes.number.def(60),
    mode: propTypes.oneOf(['date', 'datetime', 'relative']).def('relative'),
  })

  const ONE_SECONDS = 1000
  const ONE_MINUTES = ONE_SECONDS * 60
  const ONE_HOUR = ONE_MINUTES * 60
  const ONE_DAY = ONE_HOUR * 24

  const date = ref('')

  useIntervalFn(setTime, props.step * ONE_SECONDS)

  watch(
    () => props.value,
    () => {
      setTime()
    },
    { immediate: true },
  )

  function getTime() {
    const { value } = props
    let time = 0
    if (isNumber(value)) {
      const timestamp = value.toString().length > 10 ? value : value * 1000
      time = new Date(timestamp).getTime()
    } else if (isString(value)) {
      time = new Date(value).getTime()
    } else if (isObject(value)) {
      time = value.getTime()
    }
    return time
  }

  function setTime() {
    const { mode, value } = props
    const time = getTime()
    if (mode === 'relative') {
      date.value = getRelativeTime(time)
    } else {
      if (mode === 'datetime') {
        date.value = formatToDateTime(value)
      } else if (mode === 'date') {
        date.value = formatToDate(value)
      }
    }
  }

  function getRelativeTime(timeStamp: number) {
    const currentTime = new Date().getTime()

    // Determine whether the incoming timestamp is earlier than the current timestamp
    const isBefore = dateUtil(timeStamp).isBefore(currentTime)

    let diff = currentTime - timeStamp
    if (!isBefore) {
      diff = -diff
    }

    let resStr = ''
    let dirStr = isBefore ? '前' : '后'

    if (diff < ONE_SECONDS) {
      resStr = '刚刚'
      // Less than or equal to 59 seconds
    } else if (diff < ONE_MINUTES) {
      resStr = parseInt(diff / ONE_SECONDS) + '秒' + dirStr
      // More than 59 seconds, less than or equal to 59 minutes and 59 seconds
    } else if (diff >= ONE_MINUTES && diff < ONE_HOUR) {
      resStr = Math.floor(diff / ONE_MINUTES) + '分钟' + dirStr
      // More than 59 minutes and 59 seconds, less than or equal to 23 hours, 59 minutes and 59 seconds
    } else if (diff >= ONE_HOUR && diff < ONE_DAY) {
      resStr = Math.floor(diff / ONE_HOUR) + '小时' + dirStr
      // More than 23 hours, 59 minutes and 59 seconds, less than or equal to 29 days, 59 minutes and 59 seconds
    } else if (diff >= ONE_DAY && diff < 2623860000) {
      resStr = Math.floor(diff / ONE_DAY) + '天' + dirStr
      // More than 29 days, 59 minutes, 59 seconds, less than 364 days, 23 hours, 59 minutes, 59 seconds, and the incoming timestamp is earlier than the current
    } else if (diff >= 2623860000 && diff <= 31567860000 && isBefore) {
      resStr = dateUtil(timeStamp).format('MM-DD-HH-mm')
    } else {
      resStr = dateUtil(timeStamp).format('YYYY')
    }
    return resStr
  }
</script>
